builtin/ls-files.c

   1 /*
   2  * This merges the file listing in the directory cache index
   3  * with the actual working directory list, and shows different
   4  * combinations of the two.
   5  *
   6  * Copyright (C) Linus Torvalds, 2005
   7  */
   8 #include "cache.h"
   9 #include "quote.h"
  10 #include "dir.h"
  11 #include "builtin.h"
  12 #include "tree.h"
  13 #include "parse-options.h"
  14 #include "resolve-undo.h"
  15 #include "string-list.h"
  16 #include "pathspec.h"
  17 #include "run-command.h"
  18 #include "submodule.h"
  19
  20 static int abbrev;
  21 static int show_deleted;
  22 static int show_cached;
  23 static int show_others;
  24 static int show_stage;
  25 static int show_unmerged;
  26 static int show_resolve_undo;
  27 static int show_modified;
  28 static int show_killed;
  29 static int show_valid_bit;
  30 static int line_terminator = '\n';
  31 static int debug_mode;
  32 static int show_eol;
  33 static int recurse_submodules;
  34 static struct argv_array submodule_options = ARGV_ARRAY_INIT;
  35
  36 static const char *prefix;
  37 static const char *super_prefix;
  38 static int max_prefix_len;
  39 static int prefix_len;
  40 static struct pathspec pathspec;
  41 static int error_unmatch;
  42 static char *ps_matched;
  43 static const char *with_tree;
  44 static int exc_given;
  45 static int exclude_args;
  46
  47 static const char *tag_cached = "";
  48 static const char *tag_unmerged = "";
  49 static const char *tag_removed = "";
  50 static const char *tag_other = "";
  51 static const char *tag_killed = "";
  52 static const char *tag_modified = "";
  53 static const char *tag_skip_worktree = "";
  54 static const char *tag_resolve_undo = "";
  55
  56 static void write_eolinfo(const struct cache_entry *ce, const char *path)
  57 {
  58         if (!show_eol)
  59                 return;
  60         else {
  61                 struct stat st;
  62                 const char *i_txt = "";
  63                 const char *w_txt = "";
  64                 const char *a_txt = get_convert_attr_ascii(path);
  65                 if (ce && S_ISREG(ce->ce_mode))
  66                         i_txt = get_cached_convert_stats_ascii(ce->name);
  67                 if (!lstat(path, &st) && S_ISREG(st.st_mode))
  68                         w_txt = get_wt_convert_stats_ascii(path);
  69                 printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
  70         }
  71 }
  72
  73 static void write_name(const char *name)
  74 {
  75         /*
  76          * Prepend the super_prefix to name to construct the full_name to be
  77          * written.
  78          */
  79         struct strbuf full_name = STRBUF_INIT;
  80         if (super_prefix) {
  81                 strbuf_addstr(&full_name, super_prefix);
  82                 strbuf_addstr(&full_name, name);
  83                 name = full_name.buf;
  84         }
  85
  86         /*
  87          * With "--full-name", prefix_len=0; this caller needs to pass
  88          * an empty string in that case (a NULL is good for "").
  89          */
  90         write_name_quoted_relative(name, prefix_len ? prefix : NULL,
  91                                    stdout, line_terminator);
  92
  93         strbuf_release(&full_name);
  94 }
  95
  96 static void show_dir_entry(const char *tag, struct dir_entry *ent)
  97 {
  98         int len = max_prefix_len;
  99
 100         if (len >= ent->len)
 101                 die("git ls-files: internal error - directory entry not superset of prefix");
 102
 103         if (!dir_path_match(ent, &pathspec, len, ps_matched))
 104                 return;
 105
 106         fputs(tag, stdout);
 107         write_eolinfo(NULL, ent->name);
 108         write_name(ent->name);
 109 }
 110
 111 static void show_other_files(struct dir_struct *dir)
 112 {
 113         int i;
 114
 115         for (i = 0; i < dir->nr; i++) {
 116                 struct dir_entry *ent = dir->entries[i];
 117                 if (!cache_name_is_other(ent->name, ent->len))
 118                         continue;
 119                 show_dir_entry(tag_other, ent);
 120         }
 121 }
 122
 123 static void show_killed_files(struct dir_struct *dir)
 124 {
 125         int i;
 126         for (i = 0; i < dir->nr; i++) {
 127                 struct dir_entry *ent = dir->entries[i];
 128                 char *cp, *sp;
 129                 int pos, len, killed = 0;
 130
 131                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 132                         sp = strchr(cp, '/');
 133                         if (!sp) {
 134                                 /* If ent->name is prefix of an entry in the
 135                                  * cache, it will be killed.
 136                                  */
 137                                 pos = cache_name_pos(ent->name, ent->len);
 138                                 if (0 <= pos)
 139                                         die("BUG: killed-file %.*s not found",
 140                                                 ent->len, ent->name);
 141                                 pos = -pos - 1;
 142                                 while (pos < active_nr &&
 143                                        ce_stage(active_cache[pos]))
 144                                         pos++; /* skip unmerged */
 145                                 if (active_nr <= pos)
 146                                         break;
 147                                 /* pos points at a name immediately after
 148                                  * ent->name in the cache.  Does it expect
 149                                  * ent->name to be a directory?
 150                                  */
 151                                 len = ce_namelen(active_cache[pos]);
 152                                 if ((ent->len < len) &&
 153                                     !strncmp(active_cache[pos]->name,
 154                                              ent->name, ent->len) &&
 155                                     active_cache[pos]->name[ent->len] == '/')
 156                                         killed = 1;
 157                                 break;
 158                         }
 159                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 160                                 /* If any of the leading directories in
 161                                  * ent->name is registered in the cache,
 162                                  * ent->name will be killed.
 163                                  */
 164                                 killed = 1;
 165                                 break;
 166                         }
 167                 }
 168                 if (killed)
 169                         show_dir_entry(tag_killed, dir->entries[i]);
 170         }
 171 }
 172
 173 /*
 174  * Compile an argv_array with all of the options supported by --recurse_submodules
 175  */
 176 static void compile_submodule_options(const char **argv,
 177                                       const struct dir_struct *dir,
 178                                       int show_tag)
 179 {
 180         if (line_terminator == '\0')
 181                 argv_array_push(&submodule_options, "-z");
 182         if (show_tag)
 183                 argv_array_push(&submodule_options, "-t");
 184         if (show_valid_bit)
 185                 argv_array_push(&submodule_options, "-v");
 186         if (show_cached)
 187                 argv_array_push(&submodule_options, "--cached");
 188         if (show_eol)
 189                 argv_array_push(&submodule_options, "--eol");
 190         if (debug_mode)
 191                 argv_array_push(&submodule_options, "--debug");
 192
 193         /* Add Pathspecs */
 194         argv_array_push(&submodule_options, "--");
 195         for (; *argv; argv++)
 196                 argv_array_push(&submodule_options, *argv);
 197 }
 198
 199 /**
 200  * Recursively call ls-files on a submodule
 201  */
 202 static void show_gitlink(const struct cache_entry *ce)
 203 {
 204         struct child_process cp = CHILD_PROCESS_INIT;
 205         int status;
 206
 207         prepare_submodule_repo_env(&cp.env_array);
 208         argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT);
 209
 210         if (prefix_len)
 211                 argv_array_pushf(&cp.env_array, "%s=%s",
 212                                  GIT_TOPLEVEL_PREFIX_ENVIRONMENT,
 213                                  prefix);
 214         argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
 215                          super_prefix ? super_prefix : "",
 216                          ce->name);
 217         argv_array_push(&cp.args, "ls-files");
 218         argv_array_push(&cp.args, "--recurse-submodules");
 219
 220         /* add supported options */
 221         argv_array_pushv(&cp.args, submodule_options.argv);
 222
 223         cp.git_cmd = 1;
 224         cp.dir = ce->name;
 225         status = run_command(&cp);
 226         if (status)
 227                 exit(status);
 228 }
 229
 230 static void show_ce_entry(const char *tag, const struct cache_entry *ce)
 231 {
 232         struct strbuf name = STRBUF_INIT;
 233         int len = max_prefix_len;
 234         if (super_prefix)
 235                 strbuf_addstr(&name, super_prefix);
 236         strbuf_addstr(&name, ce->name);
 237
 238         if (len >= ce_namelen(ce))
 239                 die("git ls-files: internal error - cache entry not superset of prefix");
 240
 241         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 242             submodule_path_match(&pathspec, name.buf, ps_matched)) {
 243                 show_gitlink(ce);
 244         } else if (match_pathspec(&pathspec, name.buf, name.len,
 245                                   len, ps_matched,
 246                                   S_ISDIR(ce->ce_mode) ||
 247                                   S_ISGITLINK(ce->ce_mode))) {
 248                 if (tag && *tag && show_valid_bit &&
 249                     (ce->ce_flags & CE_VALID)) {
 250                         static char alttag[4];
 251                         memcpy(alttag, tag, 3);
 252                         if (isalpha(tag[0]))
 253                                 alttag[0] = tolower(tag[0]);
 254                         else if (tag[0] == '?')
 255                                 alttag[0] = '!';
 256                         else {
 257                                 alttag[0] = 'v';
 258                                 alttag[1] = tag[0];
 259                                 alttag[2] = ' ';
 260                                 alttag[3] = 0;
 261                         }
 262                         tag = alttag;
 263                 }
 264
 265                 if (!show_stage) {
 266                         fputs(tag, stdout);
 267                 } else {
 268                         printf("%s%06o %s %d\t",
 269                                tag,
 270                                ce->ce_mode,
 271                                find_unique_abbrev(ce->oid.hash, abbrev),
 272                                ce_stage(ce));
 273                 }
 274                 write_eolinfo(ce, ce->name);
 275                 write_name(ce->name);
 276                 if (debug_mode) {
 277                         const struct stat_data *sd = &ce->ce_stat_data;
 278
 279                         printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 280                         printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 281                         printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 282                         printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 283                         printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 284                 }
 285         }
 286
 287         strbuf_release(&name);
 288 }
 289
 290 static void show_ru_info(void)
 291 {
 292         struct string_list_item *item;
 293
 294         if (!the_index.resolve_undo)
 295                 return;
 296
 297         for_each_string_list_item(item, the_index.resolve_undo) {
 298                 const char *path = item->string;
 299                 struct resolve_undo_info *ui = item->util;
 300                 int i, len;
 301
 302                 len = strlen(path);
 303                 if (len < max_prefix_len)
 304                         continue; /* outside of the prefix */
 305                 if (!match_pathspec(&pathspec, path, len,
 306                                     max_prefix_len, ps_matched, 0))
 307                         continue; /* uninterested */
 308                 for (i = 0; i < 3; i++) {
 309                         if (!ui->mode[i])
 310                                 continue;
 311                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 312                                find_unique_abbrev(ui->sha1[i], abbrev),
 313                                i + 1);
 314                         write_name(path);
 315                 }
 316         }
 317 }
 318
 319 static int ce_excluded(struct dir_struct *dir, const struct cache_entry *ce)
 320 {
 321         int dtype = ce_to_dtype(ce);
 322         return is_excluded(dir, ce->name, &dtype);
 323 }
 324
 325 static void show_files(struct dir_struct *dir)
 326 {
 327         int i;
 328
 329         /* For cached/deleted files we don't need to even do the readdir */
 330         if (show_others || show_killed) {
 331                 if (!show_others)
 332                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 333                 fill_directory(dir, &pathspec);
 334                 if (show_others)
 335                         show_other_files(dir);
 336                 if (show_killed)
 337                         show_killed_files(dir);
 338         }
 339         if (show_cached || show_stage) {
 340                 for (i = 0; i < active_nr; i++) {
 341                         const struct cache_entry *ce = active_cache[i];
 342                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 343                             !ce_excluded(dir, ce))
 344                                 continue;
 345                         if (show_unmerged && !ce_stage(ce))
 346                                 continue;
 347                         if (ce->ce_flags & CE_UPDATE)
 348                                 continue;
 349                         show_ce_entry(ce_stage(ce) ? tag_unmerged :
 350                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 351                 }
 352         }
 353         if (show_deleted || show_modified) {
 354                 for (i = 0; i < active_nr; i++) {
 355                         const struct cache_entry *ce = active_cache[i];
 356                         struct stat st;
 357                         int err;
 358                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 359                             !ce_excluded(dir, ce))
 360                                 continue;
 361                         if (ce->ce_flags & CE_UPDATE)
 362                                 continue;
 363                         if (ce_skip_worktree(ce))
 364                                 continue;
 365                         err = lstat(ce->name, &st);
 366                         if (show_deleted && err)
 367                                 show_ce_entry(tag_removed, ce);
 368                         if (show_modified && ce_modified(ce, &st, 0))
 369                                 show_ce_entry(tag_modified, ce);
 370                 }
 371         }
 372 }
 373
 374 /*
 375  * Prune the index to only contain stuff starting with "prefix"
 376  */
 377 static void prune_cache(const char *prefix, size_t prefixlen)
 378 {
 379         int pos;
 380         unsigned int first, last;
 381
 382         if (!prefix)
 383                 return;
 384         pos = cache_name_pos(prefix, prefixlen);
 385         if (pos < 0)
 386                 pos = -pos-1;
 387         first = pos;
 388         last = active_nr;
 389         while (last > first) {
 390                 int next = (last + first) >> 1;
 391                 const struct cache_entry *ce = active_cache[next];
 392                 if (!strncmp(ce->name, prefix, prefixlen)) {
 393                         first = next+1;
 394                         continue;
 395                 }
 396                 last = next;
 397         }
 398         memmove(active_cache, active_cache + pos,
 399                 (last - pos) * sizeof(struct cache_entry *));
 400         active_nr = last - pos;
 401 }
 402
 403 /*
 404  * Read the tree specified with --with-tree option
 405  * (typically, HEAD) into stage #1 and then
 406  * squash them down to stage #0.  This is used for
 407  * --error-unmatch to list and check the path patterns
 408  * that were given from the command line.  We are not
 409  * going to write this index out.
 410  */
 411 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 412 {
 413         struct tree *tree;
 414         unsigned char sha1[20];
 415         struct pathspec pathspec;
 416         struct cache_entry *last_stage0 = NULL;
 417         int i;
 418
 419         if (get_sha1(tree_name, sha1))
 420                 die("tree-ish %s not found.", tree_name);
 421         tree = parse_tree_indirect(sha1);
 422         if (!tree)
 423                 die("bad tree-ish %s", tree_name);
 424
 425         /* Hoist the unmerged entries up to stage #3 to make room */
 426         for (i = 0; i < active_nr; i++) {
 427                 struct cache_entry *ce = active_cache[i];
 428                 if (!ce_stage(ce))
 429                         continue;
 430                 ce->ce_flags |= CE_STAGEMASK;
 431         }
 432
 433         if (prefix) {
 434                 static const char *(matchbuf[1]);
 435                 matchbuf[0] = NULL;
 436                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 437                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 438         } else
 439                 memset(&pathspec, 0, sizeof(pathspec));
 440         if (read_tree(tree, 1, &pathspec))
 441                 die("unable to read tree entries %s", tree_name);
 442
 443         for (i = 0; i < active_nr; i++) {
 444                 struct cache_entry *ce = active_cache[i];
 445                 switch (ce_stage(ce)) {
 446                 case 0:
 447                         last_stage0 = ce;
 448                         /* fallthru */
 449                 default:
 450                         continue;
 451                 case 1:
 452                         /*
 453                          * If there is stage #0 entry for this, we do not
 454                          * need to show it.  We use CE_UPDATE bit to mark
 455                          * such an entry.
 456                          */
 457                         if (last_stage0 &&
 458                             !strcmp(last_stage0->name, ce->name))
 459                                 ce->ce_flags |= CE_UPDATE;
 460                 }
 461         }
 462 }
 463
 464 static const char * const ls_files_usage[] = {
 465         N_("git ls-files [<options>] [<file>...]"),
 466         NULL
 467 };
 468
 469 static int option_parse_exclude(const struct option *opt,
 470                                 const char *arg, int unset)
 471 {
 472         struct string_list *exclude_list = opt->value;
 473
 474         exc_given = 1;
 475         string_list_append(exclude_list, arg);
 476
 477         return 0;
 478 }
 479
 480 static int option_parse_exclude_from(const struct option *opt,
 481                                      const char *arg, int unset)
 482 {
 483         struct dir_struct *dir = opt->value;
 484
 485         exc_given = 1;
 486         add_excludes_from_file(dir, arg);
 487
 488         return 0;
 489 }
 490
 491 static int option_parse_exclude_standard(const struct option *opt,
 492                                          const char *arg, int unset)
 493 {
 494         struct dir_struct *dir = opt->value;
 495
 496         exc_given = 1;
 497         setup_standard_excludes(dir);
 498
 499         return 0;
 500 }
 501
 502 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 503 {
 504         int require_work_tree = 0, show_tag = 0, i;
 505         const char *max_prefix;
 506         struct dir_struct dir;
 507         struct exclude_list *el;
 508         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 509         struct option builtin_ls_files_options[] = {
 510                 /* Think twice before adding "--nul" synonym to this */
 511                 OPT_SET_INT('z', NULL, &line_terminator,
 512                         N_("paths are separated with NUL character"), '\0'),
 513                 OPT_BOOL('t', NULL, &show_tag,
 514                         N_("identify the file status with tags")),
 515                 OPT_BOOL('v', NULL, &show_valid_bit,
 516                         N_("use lowercase letters for 'assume unchanged' files")),
 517                 OPT_BOOL('c', "cached", &show_cached,
 518                         N_("show cached files in the output (default)")),
 519                 OPT_BOOL('d', "deleted", &show_deleted,
 520                         N_("show deleted files in the output")),
 521                 OPT_BOOL('m', "modified", &show_modified,
 522                         N_("show modified files in the output")),
 523                 OPT_BOOL('o', "others", &show_others,
 524                         N_("show other files in the output")),
 525                 OPT_BIT('i', "ignored", &dir.flags,
 526                         N_("show ignored files in the output"),
 527                         DIR_SHOW_IGNORED),
 528                 OPT_BOOL('s', "stage", &show_stage,
 529                         N_("show staged contents' object name in the output")),
 530                 OPT_BOOL('k', "killed", &show_killed,
 531                         N_("show files on the filesystem that need to be removed")),
 532                 OPT_BIT(0, "directory", &dir.flags,
 533                         N_("show 'other' directories' names only"),
 534                         DIR_SHOW_OTHER_DIRECTORIES),
 535                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 536                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 537                         N_("don't show empty directories"),
 538                         DIR_HIDE_EMPTY_DIRECTORIES),
 539                 OPT_BOOL('u', "unmerged", &show_unmerged,
 540                         N_("show unmerged files in the output")),
 541                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 542                             N_("show resolve-undo information")),
 543                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 544                         N_("skip files matching pattern"),
 545                         0, option_parse_exclude },
 546                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 547                         N_("exclude patterns are read from <file>"),
 548                         0, option_parse_exclude_from },
 549                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 550                         N_("read additional per-directory exclude patterns in <file>")),
 551                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 552                         N_("add the standard git exclusions"),
 553                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 554                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 555                         N_("make the output relative to the project top directory"),
 556                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 557                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 558                         N_("recurse through submodules")),
 559                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 560                         N_("if any <file> is not in the index, treat this as an error")),
 561                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 562                         N_("pretend that paths removed since <tree-ish> are still present")),
 563                 OPT__ABBREV(&abbrev),
 564                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 565                 OPT_END()
 566         };
 567
 568         if (argc == 2 && !strcmp(argv[1], "-h"))
 569                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 570
 571         memset(&dir, 0, sizeof(dir));
 572         prefix = cmd_prefix;
 573         if (prefix)
 574                 prefix_len = strlen(prefix);
 575         super_prefix = get_super_prefix();
 576         git_config(git_default_config, NULL);
 577
 578         if (read_cache() < 0)
 579                 die("index file corrupt");
 580
 581         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 582                         ls_files_usage, 0);
 583         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 584         for (i = 0; i < exclude_list.nr; i++) {
 585                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 586         }
 587         if (show_tag || show_valid_bit) {
 588                 tag_cached = "H ";
 589                 tag_unmerged = "M ";
 590                 tag_removed = "R ";
 591                 tag_modified = "C ";
 592                 tag_other = "? ";
 593                 tag_killed = "K ";
 594                 tag_skip_worktree = "S ";
 595                 tag_resolve_undo = "U ";
 596         }
 597         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 598                 require_work_tree = 1;
 599         if (show_unmerged)
 600                 /*
 601                  * There's no point in showing unmerged unless
 602                  * you also show the stage information.
 603                  */
 604                 show_stage = 1;
 605         if (dir.exclude_per_dir)
 606                 exc_given = 1;
 607
 608         if (require_work_tree && !is_inside_work_tree())
 609                 setup_work_tree();
 610
 611         if (recurse_submodules)
 612                 compile_submodule_options(argv, &dir, show_tag);
 613
 614         if (recurse_submodules &&
 615             (show_stage || show_deleted || show_others || show_unmerged ||
 616              show_killed || show_modified || show_resolve_undo || with_tree))
 617                 die("ls-files --recurse-submodules unsupported mode");
 618
 619         if (recurse_submodules && error_unmatch)
 620                 die("ls-files --recurse-submodules does not support "
 621                     "--error-unmatch");
 622
 623         parse_pathspec(&pathspec, 0,
 624                        PATHSPEC_PREFER_CWD |
 625                        PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
 626                        prefix, argv);
 627
 628         /*
 629          * Find common prefix for all pathspec's
 630          * This is used as a performance optimization which unfortunately cannot
 631          * be done when recursing into submodules
 632          */
 633         if (recurse_submodules)
 634                 max_prefix = NULL;
 635         else
 636                 max_prefix = common_prefix(&pathspec);
 637         max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
 638
 639         /* Treat unmatching pathspec elements as errors */
 640         if (pathspec.nr && error_unmatch)
 641                 ps_matched = xcalloc(pathspec.nr, 1);
 642
 643         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 644                 die("ls-files --ignored needs some exclude pattern");
 645
 646         /* With no flags, we default to showing the cached files */
 647         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 648               show_killed || show_modified || show_resolve_undo))
 649                 show_cached = 1;
 650
 651         prune_cache(max_prefix, max_prefix_len);
 652         if (with_tree) {
 653                 /*
 654                  * Basic sanity check; show-stages and show-unmerged
 655                  * would not make any sense with this option.
 656                  */
 657                 if (show_stage || show_unmerged)
 658                         die("ls-files --with-tree is incompatible with -s or -u");
 659                 overlay_tree_on_cache(with_tree, max_prefix);
 660         }
 661         show_files(&dir);
 662         if (show_resolve_undo)
 663                 show_ru_info();
 664
 665         if (ps_matched) {
 666                 int bad;
 667                 bad = report_path_error(ps_matched, &pathspec, prefix);
 668                 if (bad)
 669                         fprintf(stderr, "Did you forget to 'git add'?\n");
 670
 671                 return bad ? 1 : 0;
 672         }
 673
 674         return 0;
 675 }